Boron deficiency-Coffee | Yara Tanzania

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Nutrients

Coffee - Deformation

Symptoms
Deficiency symptoms are visible on younger leaves and on the growing point of the plants. The leaves are light green and mottled, the new developing leaves have an asymetric shape with uneven margins and necrotic spots. Furthermore the terminal buds are dying back. The tree produces secondary branches resulting in a deformed, fan-shape bush.

Reasons
Boron deficiency Calcium deficiency also shows bronzing of the youngest leaves and necrosis of emerging leaves, but bronzing starts at the margins and leaves are cupped downwards. Emerging leaves do not have an asymetric form.

Boron deficiency made worse by

Sandy soils
Alkaline soils
Soils low in organic matter
High levels of nitrogen
High levels of calcium
Cold wet weather
Periods of drought

Boron is important for

Improves flower bud development
Better quality of flowering
Improves the 'set' of fruit (beans)

Yara recommended fertilizers for Boron

YaraVita BORTRAC 150

Coffee: 1 l/ha early in the growing season, pre-flowering and again post-harvest. Water rate: 200 to 500 l/ha.

Other recommended products

YaraLiva NITRABOR

YaraVita POWER BOOST

Coffee: 1 l/acre at the start of shoot growth. Repeat if necessary after fruit set. Water rate: 200 l/ acre . Kahawa: lita 1 kwa ekari wakati wa machipukizi mapya. Rudia wakati wa uwekaji matunda kama kuna ulazima. Tumia maji kiasi cha lita 200 kwa ekari .